Hydraulic device for elevating ladders



(No Model.) 7' 2Sh'eets-Sheet 1.

0. WINTER.

HYDRAULIC DEVICE FOR ELEVATING LADDERS.

Patented Mar. 18, 1890.

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(Nd Model.) 2 Sheets-Sheet 2. 0. WINTER. HYDRAULIC DEVICE FOR ELEVATINGLADDERS.

No. 423,851. Patented Mar. 18, 1890.

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with ess es.- f w IUNITED STATES PATENT OFFICE.

CARL WINTER, OF CHICAGO, ILLINOIS.

HYDRAULIC DEVICE FOR ELEVATING LADDERS.

SPECIFICATION forming part of Letters Patent No. 423,851, dated March18, 1890.

Application filed August 19, 1889.

To all whom, it may concern:

Be it known that I, CARL WVINTER, a subj ect of the Emperor of Germany,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new, useful, and Improved Hydraulic Device for ElevatingLadders and Stand-Pipes, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings,forming a part of this specification, in which Figure 1 is a plan viewof a truck and fireescape ladder,showin g my improved hydraulic devicefor elevating said ladder. Fig. 2 is a side View of the same, partly insection, taken upon the line X, Fig. 1. Fig. 3 is a central longitudinalvertical sectional view in detail of the hydraulic apparatus; and Fig. 4is a plan view of a modification of said device, showing the sameapplied to a stand-pipe.-

Like letters of reference in the different figures indicate like parts.

The object of my invention is to provide a simple and effective motor ordevice for elevatingfiremens ladders and stand-pipes, and for analogouspurposes wherein a portable motor is requirechwhich may be simple,powerful, and easily manipulated.

To these ends my invention consists in the combination of elementshereinafter more par= ticularly described, and definitelypointed out inthe claim.

Referring to the drawings, A represents a truck, upon which is pivotallymounted,preferably at the forward end, a frame B, resting by means of afifthnvheel 0, Figs. 2 and 3, upon a plate 19*, adjusted in the usualway, forming the center of oscillation. Extending upwardly from theframe 13 and rigidly secured thereto are bracket-s C C, in which isjournaled a cross bar c, to which is attached a ladder D or otherstructure intended to be moved in the arc of a circle, the attachmentbeing near the lower end of the ladder.

Mounted upon the frame .B and rigidly attached thereto is a hydrauliccylinder E, provided with the usual piston e and pistonrod 6, passingthrough a bore eiwhich forms a guide therefor and enables the piston towork accurately in the cylinder. The cylinder E is provided withinduction and eduction ports, at which are located valves F F, for

Serial No. 821,217. (No model.)

regulating the fiow of liquid to the cylinder. A pipe f serves toconnect the induction-port with a pump G, Figs. 1 and 4, said pump be'ing in turn connected by means of a pipe 7L either with a portablereservoir H, mounted upon the truck and normally filled with water, oil,or other liquid, or by a hydrant II, as indicated in the dotted lines inFig. 1. A waste-pipe f is also connected with the induction-port. Bentarms J (better shown in Fig. 2) are attached to the lower end of theladder, to the lower extremities of which are loosely attachedpitman-rods 7a 7a, the opposite ends of which are secured to a cross-bare attached to the piston-rod.

Upon the axle c is attached a ratchet 0, adapted to be engaged by a pawl0 for the purpose of preventing the fall of the ladder in the event ofthe breakage or failure to act of other parts.

In Fig. 4 I have shown my improved elevating device applied in a similarmanner to a stand-pipe D. In such a case I prefer to make the axle chollow, as indicated in dot-' ted lines, so that the water-supplypipe Lmay communicate directly therewith, and the water may be permitted toflow through it at any elevation of the stand-pipe.

The operation of my improved elevating device is as follows: Assumingthe ladder or stand-pipe to be in a normal position, the valve f isopened and the valve f closed, as shown in Fig. 1. Upon operating thepump the liquid is forced into the cylinder E, the piston e pushed back,when the links 7.: 7c drawing upon the lever-arms F tilts the ladder orother structure upon its axis and elevates it to the desired position.The frame B may then be turned upon its vertical axis for the purpose ofadjusting the ladder with reference to the building against which it isto be placed.

The lowering of the ladder may be accomplished by opening the valve fand permitting the water to flow out more or less, according to theextent to which it is desired to have the ladder descend.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

The combination, with a vehicle, of the circular rotary frame B,centrally pivoted, braces C G, ladder D, tllllllllOllGd thereto,hydraulic In testimony whereof I have signed this cylinder, bracket J, apitnmn connecting the specificationfln the presence of two subscrib- IOsame to said hydraulic cylinder, reservoir H, ing witnesses, this 10thday of August, 1888. mounted upon the vehicle, pump G, in oper- T 5ative connection therewith and with said cyl- CARL D inder, aneduction-pipe, and valves f f, all Witnesses: combined andarrangedsubstantiallyas shown D. II. FLETCHER, and described. J. IIALPENNY.

